issue in copying QuantumCircuit

[chunfuchen]

When copying a QuantumCircuit with deepcopy, the name of circuit will not be automatically updated.
Thus, the results are wrong trying to get results based on circuit object.

Expected Behavior

The results should be consistent with provided circuit object.

Current Behavior

The results are still based on circuit name rather than circuit object.

Possible Solution

No idea.

Steps to Reproduce (for bugs)

def main():

	qr = QuantumRegister(2)
	cr = ClassicalRegister(2)

	c = QuantumCircuit(qr, cr)

	c.x(qr[1])
	c2 = copy.deepcopy(c)
	c2.x(qr[0])
	backend_name ='local_statevector_simulator'
	result = q_execute([c, c2], backend_name=backend_name, skip_translation=False)
	print(result.get_statevector(c))
	print(result.get_statevector(c2))

c and c2 will produce the same statevector.

Your Environment

• Version used: master branch
• Environment name and version (e.g. Python 3.6.1): 3.6
• Operating System and version: macOS, 10.13

[chunfuchen]

A workaround is #389 .